001    /**
002     * Copyright (C) 2007-2011, Jens Lehmann
003     *
004     * This file is part of DL-Learner.
005     *
006     * DL-Learner is free software; you can redistribute it and/or modify
007     * it under the terms of the GNU General Public License as published by
008     * the Free Software Foundation; either version 3 of the License, or
009     * (at your option) any later version.
010     *
011     * DL-Learner is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014     * GNU General Public License for more details.
015     *
016     * You should have received a copy of the GNU General Public License
017     * along with this program.  If not, see <http://www.gnu.org/licenses/>.
018     */
019    
020    package org.dllearner.prolog;
021    
022    import java.util.ArrayList;
023    
024    /**
025     * 
026     * @author Sebastian Bader
027     * 
028     */
029    public class Body {
030            private ArrayList<Literal> literals;
031    
032            public Body() {
033                    literals = new ArrayList<Literal>();
034            }
035    
036            public void addLiteral(Literal literal) {
037                    literals.add(literal);
038            }
039    
040            public ArrayList<Literal> getLiterals() {
041                    return literals;
042            }
043    
044            public boolean isEmpty() {
045                    return literals.isEmpty();
046            }
047    
048            public boolean isGround() {
049                    for (int i = 0; i < literals.size(); i++) {
050                            if (!((Literal) literals.get(i)).isGround())
051                                    return false;
052                    }
053    
054                    return true;
055            }
056    
057            public Body getInstance(Variable variable, Term term) {
058                    Body newbody = new Body();
059    
060                    for (int i = 0; i < literals.size(); i++) {
061                            Literal literal = (Literal) literals.get(i);
062                            newbody.addLiteral(literal.getInstance(variable, term));
063                    }
064    
065                    return newbody;
066            }
067    
068            @Override
069            public String toString() {
070                    StringBuffer ret = new StringBuffer();
071    
072                    for (int i = 0; i < literals.size(); i++) {
073                            ret.append(literals.get(i));
074                            if (i + 1 < literals.size())
075                                    ret.append(", ");
076                    }
077    
078                    return ret.toString();
079            }
080    
081            public String toPLString() {
082                    StringBuffer ret = new StringBuffer();
083    
084                    for (int i = 0; i < literals.size(); i++) {
085                            ret.append(((Literal) literals.get(i)).toPLString());
086                            if (i + 1 < literals.size())
087                                    ret.append(", ");
088                    }
089    
090                    return ret.toString();
091            }
092    
093    }